﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace RN.ERP.BLL.ZBDLRY.Utilities
{
    public class PersonIDCardValid
    {
        public PersonIDCardValid()
        {
        }

        /// <summary> 
        /// 验证身份证号码 
        /// </summary> 
        /// <param name="Id">身份证号码</param> 
        /// <returns>验证成功为True，否则为False</returns> 
        public static bool CheckIDCard(string Id)
        {
            if (Id.Length == 18)
            {
                bool check = CheckIDCard18(Id);
                return check;
            }
            else if (Id.Length == 15)
            {
                //bool check = CheckIDCard15(Id);
                //return check;
                return false;
            }
            else
            {
                return false;
            }
        }
        #region 身份证号码验证

        /// <summary> 
        /// 验证15位身份证号 
        /// </summary> 
        /// <param name="Id">身份证号</param> 
        /// <returns>验证成功为True，否则为False</returns> 
        private static bool CheckIDCard18(string Id)
        {
            long n = 0;
            if (long.TryParse(Id.Remove(17), out n) == false || n < Math.Pow(10, 16) || long.TryParse(Id.Replace('x', '0').Replace('X', '0'), out n) == false)
            {
                return false;//数字验证 
            }
            string address = "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91";
            if (address.IndexOf(Id.Remove(2)) == -1)
            {
                return false;//省份验证 
            }
            string birth = Id.Substring(6, 8).Insert(6, "-").Insert(4, "-");
            DateTime time = new DateTime();
            if (DateTime.TryParse(birth, out time) == false)
            {
                return false;//生日验证 
            }
            string[] arrVarifyCode = ("1,0,x,9,8,7,6,5,4,3,2").Split(',');
            string[] Wi = ("7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2").Split(',');
            char[] Ai = Id.Remove(17).ToCharArray();
            int sum = 0;
            for (int i = 0; i < 17; i++)
            {
                sum += int.Parse(Wi[i]) * int.Parse(Ai[i].ToString());
            }
            int y = -1;
            Math.DivRem(sum, 11, out y);
            if (arrVarifyCode[y] != Id.Substring(17, 1).ToLower())
            {
                return false;//校验码验证 
            }
            return true;//符合GB11643-1999标准 
        }

        /// <summary> 
        /// 验证18位身份证号 
        /// </summary> 
        /// <param name="Id">身份证号</param> 
        /// <returns>验证成功为True，否则为False</returns> 
        private static bool CheckIDCard15(string Id)
        {
            long n = 0;
            if (long.TryParse(Id, out n) == false || n < Math.Pow(10, 14))
            {
                return false;//数字验证 
            }
            string address = "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91";
            if (address.IndexOf(Id.Remove(2)) == -1)
            {
                return false;//省份验证 
            }
            string birth = Id.Substring(6, 6).Insert(4, "-").Insert(2, "-");
            DateTime time = new DateTime();
            if (DateTime.TryParse(birth, out time) == false)
            {
                return false;//生日验证 
            }
            return true;//符合15位身份证标准 
        }

        /// <summary>
        /// 获取身份证号性别
        /// </summary>
        /// <param name="idcard"></param>
        /// <param name="ischecked"></param>
        /// <returns></returns>
        public static int? GetSexbyIDCard(string idcard, bool ischecked)
        {
            //未校验身份证有效性，进行校验
            if (!ischecked)
            {
                if (!CheckIDCard(idcard))
                {
                    return null;
                }
            }
            string sex = "";

            //处理18位的身份证号码从号码中得到生日和性别代码
            if (idcard.Length == 18)
            {
                sex = idcard.Substring(14, 3);

            }
            //处理15位的身份证号码从号码中得到生日和性别代码
            else if (idcard.Length == 15)
            {
                sex = idcard.Substring(12, 3);
            }
            else { return null; }

            //性别代码为偶数是女性奇数为男性
            int sex_int = 1;
            int.TryParse(sex, out sex_int);
           
            return sex_int % 2 == 0 ? 0 : 1;

        }
        /// <summary>
        /// 获取身份证号的出生年月
        /// </summary>
        /// <param name="idcard"></param>
        /// <param name="ischecked"></param>
        /// <returns></returns>
        public static DateTime GetBirthdaybyIDCard(string idcard, bool ischecked)
        {
            DateTime bir = DateTime.MinValue;
            //未校验身份证有效性，进行校验
            if (!ischecked)
            {
                if (!CheckIDCard(idcard))
                {
                    return bir;
                }
            }
            string birthday = "";
            //处理18位的身份证号码从号码中得到生日和性别代码
            if (idcard.Length == 18)
            {
                birthday = idcard.Substring(6, 4) + "-" + idcard.Substring(10, 2) + "-" + idcard.Substring(12, 2);
            }
            else if (idcard.Length == 15)   //处理15位的身份证号码从号码中得到生日和性别代码
            {
                birthday = "19" + idcard.Substring(6, 2) + "-" + idcard.Substring(8, 2) + "-" + idcard.Substring(10, 2);
            }

            DateTime.TryParse(birthday, out bir);
            return bir;

        }
        #endregion
    }

}
